Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Ligands and receptors of SP-A and SP-D. Common ligands and Receptors for SP-A are in red, for SP-D in blue and the receptors which may bind to both are in purple. The function of the ligand-receptor activation is also noted for each receptor.
